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After few days of messing around with the configuration I finally managed to connect cp-7821 to asterisk pbx, however, I can't seem to get it to connect to 2 different sip providers, since the 7821 has 2 lines technically this should be possible, but...
Think about it for a moment, proxy request address from call manager, now it has 2 call manager and 2 server addresses, it won't know which one to provide, since both are called call manger. i've tried callmanager and callmanager1 and used usecallman...
